A group of former White House aides and top White House advisers are set to testify Tuesday about the president’s handling of the opioid crisis, according to a new report.

A bipartisan group of about 40 former Trump administration officials will deliver testimony to the House Judiciary Committee, Politico reported.

The group, which includes former Homeland Security Secretary John Kelly, former Justice Department official Sally Yates, former Attorney General Sally Yates and former White National Security Adviser Sebastian Gorka, will testify about the opioid epidemic in a closed-door session Tuesday.

“We have to have more transparency,” Kelly told Politico.

“It’s just one thing after another.”

The hearing comes as President Donald Trump is on the brink of appointing his first black justice to the Supreme Court.

Kelly, the former head of the FBI and now acting deputy attorney general, is known for his hardline stance against illegal immigration.

Kelly’s nomination is being opposed by Democratic senators from South Carolina and other states.

Kelly and his allies in the conservative legal wing of the administration are pushing hard to get the court to uphold Trump’s controversial immigration policies, including building a wall along the U.S.-Mexico border and restricting refugees from Syria.

The administration has repeatedly said it will not pursue any changes to the immigration policies that led to the deadly epidemic, which killed more than 50,000 people in the United States.

Trump has repeatedly called the opioid deaths a “public health crisis.”

Kelly and Trump have not publicly discussed their plans for opioid reform.